Few square inches of window tint
 

I assume Miatas are the least tinted cars ever. But Im asking here anyway, anyone have some scrap tint or any bit left over?

I have a roll...ill have to see what it is, might be the cling type. used it for my windows in my house :P

Go to Custom Radio on Transit.

Walk to the back, tell them you're working on <whatever project> and ask if they have <whatever size scrap>.

I did this two years ago for a project in my WRX; they hooked me up for free.